Butabarbital will lower the extent or outcome of nicardipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Observe. butabarbital will reduce the level or impact of cyclosporine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Check. buprenorphine, very long-performing injection and butabarbital both raise sedation. Stay away from or Use Alt... https://zalmayw208sut7.ttblogs.com/profile